I’m very sorry to see this. Years ago they at times nubbed my trees off at ground level. Nature and I arrived at a truce many years ago. It is a fragile peace with both sides suspicious of the other. I would consider a fence if possible. The coyotes come here frequently now and the deer mostly do not. Getting things back in balance was not easy though once i accomplished it the problems mostly dissappeared. If i can make a suggestion consider growing rootstocks like BET first. Train the deer with very thorny rootsocks they learn to leave alone. This thread will explain one of my strategies.
And then this one
@jvanheule above wisely mentioned dogs as a deers enemy as well. They do not give deer a minute to eat without harrasing them. If you do fence in an orchard a nice dog on patrol is hard to beat.